06.1 Name process X - AQA - GCSE Biology - Question 6 - 2022 - Paper 1

The process by which water is absorbed into plant roots is osmosis.

1. Water is essential for photosynthesis, as it provides the necessary hydrogen ions.
2. Water helps in maintaining turgor pressure, which supports the plant structure.

Using the provided formula:
[ \text{energy conversion efficiency} = \frac{\text{energy used for growth}}{\text{energy input}} \times 100 ]
For grass: ( \text{energy input} = 1,700,000 \text{ kJ} )
( \text{energy used for growth (grass)} = 21800 \text{ kJ} )
[ \text{efficiency of grass} = \frac{21800}{1700000} \times 100 \approx 1.282% ]
Now, calculate how many times more efficient the cow is:
[ \text{times more efficient} = \frac{\text{efficiency of cow}}{\text{efficiency of grass}} = \frac{4.098}{1.282} \approx 3.196 ]
Thus, rounded to 3 significant figures, the cow is approximately 3.20 times more efficient than grass.

1. Indoor rearing minimizes heat loss to the environment, making it more energy-efficient.
2. It reduces energy spent by the cows on movement, as they are in a confined space.

1. Increased spread of disease can occur in confined spaces.
2. It may require more energy for heating and lighting, affecting overall energy efficiency.